Average annual temperature is 18.5 °C
Absolute maximum temperature: 39.1 °C
Absolute minimum temperature: -2.4 °C
Number of sunny days: 280 days
Number of rainy days: 84 days
Number of snow days: 1 day
Look at detailed online map of San Juan de Heredia
* Weather data for San Juan de Heredia Mexico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 24.0 | 28.0 | 30.7 | 31.0 | 36.0 | 39.1 | 34.6 | 36.0 | 34.2 | 30.9 | 27.8 | 24.6 |
| Average daytime temperature (°C) | 20.4 | 22.1 | 26.5 | 27.8 | 29.5 | 34.9 | 30.8 | 31.1 | 31.5 | 24.5 | 22.5 | 20.2 |
| Average temperature (°C) | 11.4 | 12.5 | 16.7 | 18.8 | 20.8 | 26.1 | 24.0 | 23.8 | 24.1 | 17.7 | 14.2 | 11.2 |
| Average night temperature (°C) | 3.7 | 4.6 | 8.1 | 10.1 | 12.6 | 17.1 | 17.3 | 17.1 | 16.5 | 12.3 | 8.2 | 3.5 |
| Absolute minimum temperature (°C) | -2.4 | -2.3 | 1.2 | 4.7 | 7.6 | 12.6 | 15.2 | 14.4 | 14.3 | 6.5 | -0.2 | -0.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.3 | 12.0 | 12.8 | 13.4 | 13.7 | 13.6 | 13.0 | 12.3 | 11.5 | 10.9 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.7 | 10.0 | 10.3 | 10.9 | 11.0 | 11.9 | 11.8 | 11.2 | 11.1 | 7.9 | 7.9 | 9.2 |
| Precipitation (mm) | 0 | 1 | 6 | 9 | 20 | 10 | 81 | 41 | 21 | 68 | 17 | 0 |
| Sunny days | 31 | 26 | 29 | 28 | 21 | 25 | 15 | 15 | 21 | 14 | 24 | 31 |
| Rainy days | 0 | 1 | 2 | 2 | 10 | 5 | 16 | 16 | 9 | 17 | 6 | 0 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan de Heredia is at